c# - Unity - WaitForSeconds() does not work -

i developing flight simulator programme. right trying level restart after delay of 4 seconds, instead waiting forever , not responding. code (in c#) right now:

void update () {      //other irrelevant code in front      float terrainheightlocation = terrain.activeterrain.sampleheight (transform.position);      if (terrainheightlocation > transform.position.y) { //the plane crashed          startcoroutine(wait(terrainheightlocation));       } }  ienumerator wait( float terrainheightlocation) {     transform.position = new vector3 (transform.position.x,                                       terrainheightlocation,                                       transform.position.z);     instantiate(explosion, transform.position, transform.rotation);     destroy(gameobject);      debug.log ("waiting");     yield return new waitforseconds(4.0f); // waits x seconds      debug.log ("waited x seconds");      application.loadlevel(application.loadedlevel);     debug.log ("reloaded level");  } 

it great if find problem in code, because have been trying day , cannot fix it.

thanks!

typically when waitforseconds doesn't work it's 1 of 2 things:

1. time.timescale set 0.
2. the object being destroyed before time up.

in case destroying game object runs coroutine before call yield waitforseconds. destroy deferred until end of frame code until yield execute, gameobject & monobehaviour destroyed , coroutine along it.

solution: use coroutine on object persists between level ending , restarting. make object persist when level loaded (as doing in code) need call dontdestroyonload.